Trinoccular lens

[Glot]

Basic question. I have a stereo trinoccular. It came with an adjustable adapter with no lens in it. The camera I want to attach is a 1/2 CMOS. I understand I need a 1/2 reducing lens. If I do t use a lens and just attach the camera to the adapter I have, what will be the results?

[MichaelG.]

You should find that just a small section of the field-of-view is imaged by the sensor.
i.e. it is ‘cropped’

This might help you get a ‘feel’ for it:
https://www.vision-doctor.com/en/camera ... sizes.html

MichaelG.

[Scarodactyl]

Without the reducing optics only the very center of the field of view will be captured by the camera. It'd be functional but not much fun to use, and given the tight resolution specifications you're dealing with on a stereo it could push you into empty magnification territory.
edit: ^ beat me to it

[75RR]

-
Here is a link to a pdf on the subject titled: Basic Considerations When Mounting a Camera on a Trinocular Tube http://www.krebsmicro.com/pdf/trinoc_a3.pdf

Additional pertinent reading and some amazing photographs at the main site: http://www.krebsmicro.com/

[MicroBob]

I want to attach is a 1/2 CMOS. I understand I need a 1/2 reducing lens.

Hi,
you have an image circle diameter in the tube of e.g. 20mm. your 1/2'' sensor has a certain image diagonal size. In my understanding you would need a reduction optic that reduces 20mm to the size of your sensor, like 0,3x or less.

Bob

[david_b]

You should find that just a small section of the field-of-view is imaged by the sensor.
i.e. it is ‘cropped’

This might help you get a ‘feel’ for it:
https://www.vision-doctor.com/en/camera ... sizes.html

MichaelG.

Very interesting website, thanks for the link.

Why is it that cameras designed for microscopes are such low resolution?

For example, a top of the range 10 MP Moticam is more than three times the price of a 24 MP Canon APS-C DSLR.

[Glot]

I have purchased a 1/2 CMOS camera and mounted it to try while I wait to get a reducing lens adapter. Light is my biggest issue. Optically, the subject is well lit but via the camera very dark. I am hoping the lens will help this problem.

[Scarodactyl]

It should help quite a bit, though remember that the camera has a lot less dynamic range than your eye.

[MichaelG.]

A slight digression, and the information is a few years old, but:

I thought folks might find this brief document useful for reference:
http://users.ox.ac.uk/~atdgroup/referen ... ormats.pdf

MichaelG.